<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i"><image :src="item.pics_big" @click="preview(i)"></image></swiper-item>
		</swiper>
		<!-- 商品信息 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
			<view class="price">￥{{ goods_info.goods_price }}</view>
			<!-- 商品信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品的名字 -->
				<view class="goods-name">{{ goods_info.goods_name }}</view>
				<!-- 收藏区域 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		<!-- 商品详情 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>

		<!-- 商品导航区域 -->
		<view class="goods_nav">
			<uni-goods-nav :fill="true" :options="options" :button-group="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	// 从vuex中按需导入 mapState, mapMutations,mapGetters辅助方法
import { mapState, mapMutations, mapGetters } from 'vuex'

export default {
	computed:{
		// 调用mapState方法，把m_cart模块的cart数组映射到当前页面，作为计算属性来使用
		// ...mapState('模块名称', ['要映射的数据名称1', '要映射的数据名称2'], ......)
		...mapState('m_cart', []),
		// 用法同上
		...mapGetters('m_cart',['total'])
	},
	watch:{
		// 定义侦听器，监听计算属性 tatol
		total:{
			handler(newVal){
				const findResult = this.options.find(x => x.text === '购物车')
				// console.log(findResult)
				if(findResult){
					// 当数据发生变化时，重新给按钮的info赋值
					findResult.info = newVal
				}
			},
			immediate: true
		}
	},
	
	data() {
		return {
			goods_info: {},
			options: [
				{
					icon: 'shop',
					text: '店铺'
				},
				{
					icon: 'cart',
					text: '购物车',
					info: 0,
					infoBackgroundColor: 'red',
					infoColor: '#fff'
				}
			],
			buttonGroup: [
				{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				},
				{
					text: '立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}
			]
		};
	},
	methods: {
		// 调用mapMutations 把m_cart模块中的函数映射到当前页面
		// mapMutations('模块名称', ['要映射的函数名称', .....])
		...mapMutations('m_cart',['addToCart',]),
		async getGoodsDetail(goods_id) {
			const { data: res } = await uni.$http.get('/api/public/v1/goods/detail', { goods_id });
			console.log(res)
			if (res.meta.status !== 200) return uni.$showMsg;
			// 使用字符串replace()方法，将img标签中添加行内样式，解决图片底部空白的问题
			res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block" ').replace(/webp/g, 'jpg');

			this.goods_info = res.message;
			console.log(this.goods_info);
			console.log(111)
		},
		// 实现轮播图的预览效果
		preview(i) {
			// 使用uni.previewImage()方法预览图片
			uni.previewImage({
				// 预览时，默认显示图片的索引
				current: i,
				// 所有图片url地址的数组
				urls: this.goods_info.pics.map(x => x.pics_big)
			});
		},
		// 点击按钮去购物车
		onClick(e){
			// console.log(e)
			if(e.content.text === '购物车'){
				uni.switchTab({
					url:'/pages/cart/cart'
				})
			}
		},
		buttonClick(e){
			if(e.content.text === '加入购物车'){
				// 组织商品信息对象
				const goods = {
					goods_id: this.goods_info.goods_id,
					goods_name: this.goods_info.goods_name,
					goods_price: this.goods_info.goods_price,
					goods_count: 1,
					goods_small_logo: this.goods_info.goods_small_logo,
					goods_state: true
				}
				// 调用addToCart方法
				this.addToCart(goods)
			}
		}
	},
	onLoad(optoins) {
		console.log(optoins)
		const goods_id = +optoins.good_id;
		console.log(goods_id)
		this.getGoodsDetail(goods_id);
		
	}
};
</script>

<style lang="scss">
	.goods-detail-container{
		padding-bottom: 50px;
	}
swiper {
	height: 750rpx;
	image {
		width: 100%;
		height: 100%;
	}
}
.goods-info-box {
	padding: 10px;
	padding-right: 0;
	.price {
		color: #c00000;
		font-size: 18px;
		margin: 10px 0;
	}
	.goods-info-body {
		display: flex;
		justify-content: space-between;

		.goods-name {
			font-size: 13px;
			margin-right: 10px;
		}
		.favi {
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: center;
			border-left: 1px solid #efefef;
			color: gray;
		}
	}
	.yf {
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
}
.goods_nav{
	position: fixed;
	bottom: 0ch;
	left: 0;
	width: 100%;
}
</style>
